1 // RUN: %clang -DSUB_I32 -fsanitize=signed-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s --check-prefix=SUB_I32 2 // RUN: %clang -DSUB_I64 -fsanitize=signed-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s --check-prefix=SUB_I64 3 // RUN: %clang -DSUB_I128 -fsanitize=signed-integer-overflow %s -o %t && %t 2>&1 | FileCheck %s --check-prefix=SUB_I128 4 5 #include <stdint.h> 6 #include <stdio.h> 7 8 int main() { 9 // These promote to 'int'. 10 (void)(int8_t(-2) - int8_t(0x7f)); 11 (void)(int16_t(-2) - int16_t(0x7fff)); 12 13 #ifdef SUB_I32 14 (void)(int32_t(-2) - int32_t(0x7fffffff)); 15 // CHECK-SUB_I32: sub-overflow.cpp:[[@LINE-1]]:22: runtime error: signed integer overflow: -2 - 2147483647 cannot be represented in type 'int' 16 #endif 17 18 #ifdef SUB_I64 19 (void)(int64_t(-8000000000000000000ll) - int64_t(2000000000000000000ll)); 20 // CHECK-SUB_I64: -8000000000000000000 - 2000000000000000000 cannot be represented in type '{{long( long)?}}' 21 #endif 22 23 #ifdef SUB_I128 24 # ifdef __SIZEOF_INT128__ 25 (void)(-(__int128_t(1) << 126) - (__int128_t(1) << 126) - 1); 26 # else 27 puts("__int128 not supported"); 28 # endif 29 // CHECK-SUB_I128: {{0x80000000000000000000000000000000 - 1 cannot be represented in type '__int128'|__int128 not supported}} 30 #endif 31 } 32
